Soft hammer



yz192 WHWCRACKEN I 1,711,505

SOFT HAMMER Filed March 21, 1928 Patented May 7, 1929.

UNITED STATES PATENT OFFICE.

SOFT HAMMER.

Application filed. March 21, 1928. Serial No. 263,496.

This invention relates to improvements in hammers provided with a relatively soft metal striking face so as no'tto mar or damage machined surfaces when making drive fits. The hammer is also useful as a sledge buffer. That is, it may be used as an intermediate tool to be pounded by another hammer, the soft face of the improved hammer being held in contact with the work and a driving force being transmitted through the tool steel head of the improved hammer. heretofore hammer heads have been made entirely of copper, lead, and similar soft metals but when such hammers become marred they are usually discarded in their entirety. Their use therefore. wasteful. Moreover, in service the heads of the former soft hammers easily work loose from the hammer handles. Such soft metal heads are not suitable for use as buffers in connection with other sledges because they are so readily deformed or mashed to a form which renders them unsuitable for further use.

My improved hammer provides a tool having a replaceable soft Working face and over comes the disadvantages inherent in the tools of this class heretoforeuse'd. The invention will be fully apparent from the following description when read in connection with the accompanying drawings and will be defined with particularity in the appended claims. In the drawings Fig. 1 is a side view of a hammer embodying my invention;

Fig. 2 is a top view thereof with aportion of the hammer shown in section.

Referring in detail to the drawings, 10 represents a tool steel hammer head which is provided with the usual socket 12 for the reception of the hammer handle 14. T0 at least one end of the hammer head, I provide a soft metalworking face. In the embodiment of the inventionillustrated, this working face is secured by brazing a copper piece 16 to the end of the hammer head, this piece 16 being provided with an integral tapereddowel portion 18 which engages a similarly tapered socket 20 formed in the end of the hammer head. The dowel portion 18 makes a snug fit with the socket 20 and serves to center the piece 16 with the hammer head 10. The front of the hammer head is bevelled as I am aware that indicated at 21 so as to form an annular pocket or groovefor the reception of the metal or alloy 22 which forms the bond or joint betweein the piece 16 and the end ofthe hammer heat The joint may be conveniently made by means of an ordinary brazing alloy or the parts can be secured by an electric welding pencil or by oxyacetylene or other types of welding.

Because of the drive fit between the tapered dowel 18 and the similarly tapered socket 20 formed in the tool steel head, the joint metal 22 is relieved of certain working strains, the dowel member especially taking the shear or side strains, thus helping to prevent thelooscning of the copperv piece 16.

From theforegoing it is apparent that when the soft metal piece 16 becomes deformed or badly worn from use, it can be readily detached by chipping away the bonding metal 22 by means of a cold-chisel and hamm r, thus the worn stump of the piece 16 can be knocked off and a new soft face applied and welded in position.

Various modifications may be made without departing from the invention as defined in the appended claims.

lVhatI claim is f 1. A hammer head of hard metal having a removable face piece of softer metal, said head and face piece being interlocked with another to resist lateral strains and havmg substantial abutting surfaces to sustaln the ordinary hammering strains normal to said surfaces and a shallow external welded joint between the head and the removable face piece readily susceptible to intended destruction for removal of the soft metal face piece.

9.. A hammer head of hard metal having a removable face piece of softer metal, said parts having substantial abutting faces to sustain the ordinary strains of hammering normal to said faces and a shallow marginal welded joint between the head and the removable face piece readily susceptible to intended destruction for removal of the soft metal face piece.

In witness whereof, I have hereunto signed my name.

WILLIAM H. MCCRACKEN. 

